Tokyo Keiki TG-8000 Series, Operator'S Manual, Page: 24 / 105

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1.3.5 Automatic speed error correction function
The system has functions to calculate speed error, inherent error to the /200gyrocompass,
and to correct it automatically.
Required data of latitude and speed to calculate the speed error are selected and entered
in the individual systems of {"GYRO" / "GNSS"} and {"LOG (contact signal)" / "LOG
(serial signal)" / "GNSS" / "MANUAL"}.
(For the selection of latitude and ship's speed input system, operate according to "(4)
Setting of the latitude input system and (7) Setting of the ship's speed input system" in
Chapter 3 Operation, for 3.4.1 System Start-up.)
When "GNSS" is selected as the input system, the serial signal conformed to IEC61162-1
/ IEC61162-1 ed. 2 is received.
When "LOG (serial signal)" is selected as the input system, the serial signal conformed to
IEC61162 / IEC61162-1 ed. 2 is received.
Also other than "MANUAL" is selected as the input system, speed error correction can be
performed in real time.
1.3.6 Timer start
The gyrocompass can be automatically started according to date and time set for the
departure. (It can be set up to one month maximum)
For setting up the departure date and time, operate according to "(2) Setting of timer start
time" in Chapter 3 Operation, for 3.4.1 Start.
1.3.7 Function by the external heading sensor
When the external heading sensor signal (the magnetic compass system, etc.) is
connected to this system, the repeater signal (serial signal or step signal) can be
outputted from this system by using the external heading sensor.
Also when the processing unit for the external heading sensor signal is built in this
system as an option, the repeater signal (2 circuits for serial signal and 1 circuit for step
signal) can be backup by using the external heading sensor even if the gyrocompass
stops . (For the system selection, refer to "3.4.2 System Selection" in Chapter 3.)
1.3.8 Master compass running stop function (Optional)
When any abnormal condition or failure (as E-3/E-A is provided or true heading is largely
unstable) occurs in the master compass, turn the
“master compass power switch” in the
steering stand or the control unit to OFF.
Then it enables to stop the master compass running and change the output of heading
information to an external heading sensor if connected, for minimizing the loss of heading
signal.
Note that while this switch is turned off, gyrocompass heading is out of use.